Function storage_update_playback_context 

pub async fn storage_update_playback_context(
    db: State<'_, DatabaseWrapper>,
    user_id: String,
    item_id: String,
    position_ms: i64,
    context_type: Option<String>,
    context_id: Option<String>,
) -> Result<(), String>

Update playback progress with context in local database This stores the progress along with playback context (container vs single)